Vehicle-to-Vehicle (V2V) Communication System

Introduction to V2V

V2V communication allows vehicles to exchange information about speed, position, and direction. This enables collision warnings and traffic coordination without infrastructure.

V2V Technologies

Hardware Setup

• ESP32: Main controller
• LoRa SX1278: Long-range communication
• NEO-6M GPS: Position & speed
• MPU6050: Acceleration/braking detection
• Buzzer: Collision alerts
• OLED: Status display

ESP32 Firmware

#include <LoRa.h>
#include <TinyGPS++.h>

TinyGPSPlus gps;

struct VehicleData {
  float lat, lng;
  float speed;
  float heading;
  bool braking;
  uint32_t timestamp;
};

void setup() {
  LoRa.begin(915E6);
  Serial2.begin(9600, SERIAL_8N1, 16, 17);
}

void loop() {
  VehicleData myData = readVehicleData();
  broadcastData(myData);
  
  if (LoRa.parsePacket()) {
    VehicleData received = receiveData();
    checkCollisionRisk(myData, received);
  }
}

void broadcastData(VehicleData data) {
  LoRa.beginPacket();
  LoRa.write((byte*)&data, sizeof(data));
  LoRa.endPacket();
}

Safety Features

• Forward Collision: Alert if closing rate is dangerous
• Blind Spot: Warn when vehicle in blind zone
• Emergency Brake: Broadcast hard braking events
• Intersection: Alert for crossing vehicles

Implementation Challenges

• Latency: Must be <100ms for safety
• Security: Prevent spoofing attacks
• Privacy: Don't track vehicle identity
• Interference: Handle urban RF noise